Calculate the Wavelength of Light Emitted When an Electron in a Hydrogen

Multiple Choice

Calculate the wavelength of light emitted when an electron in a hydrogen atom falls from the n = 4 orbit to the n = 1 orbit (R_h = 1.1×10⁷ m ^{- 1}) .

A) 9.7×10 ^{- 8} m
B) 6.5×10 ^{- 7} m
C) 3.6×10 ^{- 7} m
D) 6.4×10 ^{- 6} m
E) none of these